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                        <li class="item item-class toggle-manual toggle-manual-show"
                            data-longname="module:ol/control/OverviewMap~OverviewMap"
                            data-name="ol/control/overviewmap">
                            <span class="title toggle">
                                <span class="fa fa-chevron-right me-2 mt-1"></span>
                                <span><a
                                        href="module-ol_control_OverviewMap-OverviewMap.html">ol​/control​/OverviewMap</a></span>
                            </span>
                            <div class="member-list" data-type="methods">
                                <span class="subtitle">Methods</span>
                                <ul>
                                    <li data-name="changed"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#changed">changed</a>
                                    <li data-name="dispatchevent"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#dispatchEvent">dispatchEvent</a>
                                    <li data-name="get"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#get">get</a>
                                    <li data-name="getcollapsed"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#getCollapsed">getCollapsed</a>
                                    <li data-name="getcollapsible"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#getCollapsible">getCollapsible</a>
                                    <li data-name="getkeys"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#getKeys">getKeys</a>
                                    <li data-name="getmap"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#getMap">getMap</a>
                                    <li data-name="getoverviewmap"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#getOverviewMap">getOverviewMap</a>
                                    <li data-name="getproperties"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#getProperties">getProperties</a>
                                    <li data-name="getrevision"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#getRevision">getRevision</a>
                                    <li data-name="getrotatewithview"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#getRotateWithView">getRotateWithView</a>
                                    <li data-name="on"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#on">on</a>
                                    <li data-name="once"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#once">once</a>
                                    <li data-name="render"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#render">render</a>
                                    <li data-name="set"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#set">set</a>
                                    <li data-name="setcollapsed"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#setCollapsed">setCollapsed</a>
                                    <li data-name="setcollapsible"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#setCollapsible">setCollapsible</a>
                                    <li data-name="setmap"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#setMap">setMap</a>
                                    <li data-name="setproperties"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#setProperties">setProperties</a>
                                    <li data-name="setrotatewithview"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#setRotateWithView">setRotateWithView</a>
                                    <li data-name="settarget"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#setTarget">setTarget</a>
                                    <li data-name="un"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#un">un</a>
                                    <li data-name="unset"><a
                                            href="module-ol_control_OverviewMap-OverviewMap.html#unset">unset</a>
                                </ul>
                            </div>
                            <div class="member-list" data-type="fires">
                                <span class="subtitle">Fires</span>
                                <ul>
                                    <li data-name="change"><a
                                            href="module-ol_events_Event-BaseEvent.html#event:change">change</a>
                                    <li data-name="error"><a
                                            href="module-ol_events_Event-BaseEvent.html#event:error">error</a>
                                    <li data-name="propertychange"><a
                                            href="module-ol_Object.ObjectEvent.html#event:propertychange">propertychange</a>
                                </ul>
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                        <li class="loading">Loading …
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            <div class="main col-md-8 col-lg-9">
                <h1 class="page-title" data-filename="module-ol_control_OverviewMap-OverviewMap.html">Class: OverviewMap
                </h1>
                <div id="latest-check" class="alert alert-warning alert-dismissible" role="alert" style="display:none">
                    <button id="latest-dismiss" type="button" class="btn-close" data-bs-dismiss="alert"
                        aria-label="Close"></button>
                    This documentation is for OpenLayers v<span id="package-version">8.2.0</span>. The <a
                        id="latest-link" href="#" class="alert-link">latest</a> is v<span id="latest-version"></span>.
                </div>




                <section class="content">

                    <header>
                        <h2 class="my-3">
                            <span class="ancestors"><a
                                    href="module-ol_control_OverviewMap.html">ol/control/OverviewMap</a>~</span>OverviewMap
                        </h2>
                        <br>



                        <pre
                            class="prettyprint source"><code>import OverviewMap from '<a href="module-ol_control_OverviewMap.html">ol/control/OverviewMap</a>.js';</code></pre>


                        <div class="row p-3 ">
                            <!-- <div id="ad" class="col-lg-5 order-2 align-self-center border rounded bg-light ">
                                <script async type="text/javascript"
                                    src="https://cdn.carbonads.com/carbon.js?serve=CE7DV53U&placement=openlayersorg"
                                    id="_carbonads_js"></script>
                            </div> -->

                            <div class="class-description col-lg-7 align-self-center ps-0">
                                <p>Create a new control with a map acting as an overview map for another
                                    defined map.</p>
                            </div>

                        </div>
                    </header>

                    <article>
                        <div class="container-overview">



                            <dl>

                                <dt class="">

                                    <div class="nameContainer">
                                        <div class="anchor" id="OverviewMap">
                                        </div>
                                        <h4 class="name">
                                            new OverviewMap<span class="signature">(<span
                                                    class="optional">options</span>)</span>



                                        </h4>

                                        <div class="tag-source">
                                            <a
                                                href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/OverviewMap.js">control/OverviewMap.js</a>,
                                            <a
                                                href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/OverviewMap.js#L67">line
                                                67</a>
                                        </div>

                                    </div>


                                </dt>
                                <dd class="">













                                    <table class="params">
                                        <thead>
                                            <tr>

                                                <th>Name</th>


                                                <th>Type</th>

                                                <th class="last">Description</th>
                                            </tr>
                                        </thead>

                                        <tbody>


                                            <tr class="">

                                                <td class="name"><code>className</code></td>



                                                <td class="type">


                                                    <span class="param-type">string</span>



                                                    (defaults to 'ol-overviewmap')


                                                </td>



                                                <td class="description last">

                                                    <p>css类名</p>
                                                </td>
                                            </tr>



                                            <tr class="">

                                                <td class="name"><code>collapsed</code></td>



                                                <td class="type">


                                                    <span class="param-type">boolean</span>



                                                    (defaults to true)


                                                </td>



                                                <td class="description last">

                                                    <p>Whether the control should start collapsed or not (expanded).</p>
                                                </td>
                                            </tr>



                                            <tr class="">

                                                <td class="name"><code>collapseLabel</code></td>



                                                <td class="type">


                                                    <span class="param-type">string</span>
                                                    |

                                                    <span class="param-type">HTMLElement</span>



                                                    (defaults to '‹')


                                                </td>



                                                <td class="description last">

                                                    <p>Text label to use for the
                                                        expanded overviewmap button. Instead of text, also an element
                                                        (e.g. a <code>span</code> element) can be used.</p>
                                                </td>
                                            </tr>



                                            <tr class="">

                                                <td class="name"><code>collapsible</code></td>



                                                <td class="type">


                                                    <span class="param-type">boolean</span>



                                                    (defaults to true)


                                                </td>



                                                <td class="description last">

                                                    <p>Whether the control can be collapsed or not.</p>
                                                </td>
                                            </tr>



                                            <tr class="">

                                                <td class="name"><code>label</code></td>



                                                <td class="type">


                                                    <span class="param-type">string</span>
                                                    |

                                                    <span class="param-type">HTMLElement</span>



                                                    (defaults to '›')


                                                </td>



                                                <td class="description last">

                                                    <p>Text label to use for the collapsed
                                                        overviewmap button. Instead of text, also an element (e.g. a
                                                        <code>span</code> element) can be used.
                                                    </p>
                                                </td>
                                            </tr>



                                            <tr class="">

                                                <td class="name"><code>layers</code></td>



                                                <td class="type">


                                                    <span class="param-type">Array&lt;<a
                                                            href="module-ol_layer_Base-BaseLayer.html">BaseLayer</a>></span>
                                                    |

                                                    <span class="param-type"><a
                                                            href="module-ol_Collection-Collection.html">Collection</a>&lt;<a
                                                            href="module-ol_layer_Base-BaseLayer.html">BaseLayer</a>></span>

                                                    | undefined


                                                </td>



                                                <td class="description last">

                                                    <p>Layers for the overview map.</p>
                                                </td>
                                            </tr>



                                            <tr class="">

                                                <td class="name"><code>render</code></td>



                                                <td class="type">


                                                    <span class="param-type">function</span>

                                                    | undefined


                                                </td>



                                                <td class="description last">

                                                    <p>Function called when the control
                                                        should be re-rendered. This is called in a
                                                        <code>requestAnimationFrame</code> callback.
                                                    </p>
                                                </td>
                                            </tr>



                                            <tr class="">

                                                <td class="name"><code>rotateWithView</code></td>



                                                <td class="type">


                                                    <span class="param-type">boolean</span>



                                                    (defaults to false)


                                                </td>



                                                <td class="description last">

                                                    <p>Whether the control view should rotate with the main map view.
                                                    </p>
                                                </td>
                                            </tr>



                                            <tr class="">

                                                <td class="name"><code>target</code></td>



                                                <td class="type">


                                                    <span class="param-type">HTMLElement</span>
                                                    |

                                                    <span class="param-type">string</span>

                                                    | undefined


                                                </td>



                                                <td class="description last">

                                                    <p>如果您希望控件在地图的视口之外进行渲染，请指定一个目标。</p>
                                                </td>
                                            </tr>



                                            <tr class="">

                                                <td class="name"><code>tipLabel</code></td>



                                                <td class="type">


                                                    <span class="param-type">string</span>



                                                    (defaults to 'Overview map')


                                                </td>



                                                <td class="description last">

                                                    <p>用于按钮提示的文本标签。</p>
                                                </td>
                                            </tr>



                                            <tr class="">

                                                <td class="name"><code>view</code></td>



                                                <td class="type">


                                                    <span class="param-type"><a
                                                            href="module-ol_View-View.html">View</a></span>

                                                    | undefined


                                                </td>



                                                <td class="description last">

                                                    <p>Custom view for the overview map (should use same projection as
                                                        main map). If not provided,
                                                        a default view with the same projection as the main map will be
                                                        used.</p>
                                                </td>
                                            </tr>


                                        </tbody>
                                    </table>




                                    <dl class="details">





















                                    </dl>



                                    <h5>Fires:</h5>
                                    <ul>
                                        <li class="">
                                            <code><a href="module-ol_events_Event-BaseEvent.html#event:change">change</a></code>
                                            (<a href="module-ol_events_Event-BaseEvent.html">BaseEvent</a>)
                                            -通用更改事件。在修订计数器增加时触发。
                                        </li>

                                        <li class="">
                                            <code><a href="module-ol_events_Event-BaseEvent.html#event:error">error</a></code>
                                            (<a
                                                href="module-ol_events_Event-BaseEvent.html">BaseEvent</a>)-通用错误事件。在发生错误时触发。
                                        </li>

                                        <li class="">
                                            <code><a href="module-ol_Object.ObjectEvent.html#event:propertychange">propertychange</a></code>
                                            (<a href="module-ol_Object.ObjectEvent.html">ObjectEvent</a>) - 当属性发生更改时触发。
                                        </li>
                                    </ul>











                                </dd>

                            </dl>

                        </div>




                        <h3 class="subsection-title">Extends</h3>

                        <ul>
                            <li><a href="module-ol_control_Control-Control.html">Control</a></li>
                        </ul>















                        <h3 class="subsection-title">Methods</h3>

                        <dl>


                            <dt class="">

                                <div class="nameContainer inherited">
                                    <div class="anchor" id="changed">
                                    </div>
                                    <h4 class="name">
                                        changed<span class="signature">()</span>

                                        <span class="inherited"><a
                                                href="module-ol_Observable-Observable.html#changed">inherited</a></span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/Observable.js">Observable.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/Observable.js#L68">line
                                            68</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">
                                <div class="description">
                                    <p>增加修订计数器并派发一个 'change' 事件。</p>
                                </div>











                                <dl class="details">





















                                </dl>













                            </dd>




                            <dt class="">

                                <div class="nameContainer inherited">
                                    <div class="anchor" id="dispatchEvent">
                                    </div>
                                    <h4 class="name">
                                        dispatchEvent<span class="signature">(event)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{boolean | undefined}</span>

                                        <span class="inherited"><a
                                                href="module-ol_events_Target-Target.html#dispatchEvent">inherited</a></span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/events/Target.js">events/Target.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/events/Target.js#L85">line
                                            85</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">
                                <div class="description">
                                    <p>派发一个事件并调用所有监听此类型事件的监听器。事件参数可以是字符串或具有 <code>type</code>属性的对象。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>event</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_events_Event-BaseEvent.html">BaseEvent</a></span>
                                                |

                                                <span class="param-type">string</span>




                                            </td>



                                            <td class="description last">

                                                <p>Event object.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                如果任何人在事件对象上调用 preventDefault，或者如果任何监听器返回 false，则为<code>false</code>。
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer inherited">
                                    <div class="anchor" id="get">
                                    </div>
                                    <h4 class="name">
                                        get<span class="signature">(key)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{*}</span>

                                        <span class="inherited"><a
                                                href="module-ol_Object-BaseObject.html#get">inherited</a></span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/Object.js">Object.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/Object.js#L135">line
                                            135</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">




                                <div class="description">
                                    <p>获取一个值。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>key</code></td>



                                            <td class="type">


                                                <span class="param-type">string</span>




                                            </td>



                                            <td class="description last">
                                                <p>键名称。</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                Value.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id="getCollapsed">
                                    </div>
                                    <h4 class="name">
                                        getCollapsed<span class="signature">()</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{boolean}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/OverviewMap.js">control/OverviewMap.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/OverviewMap.js#L624">line
                                            624</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">




                                <div class="description">
                                    <p>Determine if the overview map is collapsed.</p>
                                </div>











                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                The overview map is collapsed.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id="getCollapsible">
                                    </div>
                                    <h4 class="name">
                                        getCollapsible<span class="signature">()</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{boolean}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/OverviewMap.js">control/OverviewMap.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/OverviewMap.js#L585">line
                                            585</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">




                                <div class="description">
                                    <p>Return <code>true</code> if the overview map is collapsible, <code>false</code>
                                        otherwise.</p>
                                </div>











                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                True if the widget is collapsible.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer inherited">
                                    <div class="anchor" id="getKeys">
                                    </div>
                                    <h4 class="name">
                                        getKeys<span class="signature">()</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{Array.&lt;string>}</span>

                                        <span class="inherited"><a
                                                href="module-ol_Object-BaseObject.html#getKeys">inherited</a></span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/Object.js">Object.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/Object.js#L148">line
                                            148</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <div class="description">
                                    <p>获取对象属性名称的列表。</p>
                                </div>











                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                属性名称列表。
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer inherited">
                                    <div class="anchor" id="getMap">
                                    </div>
                                    <h4 class="name">
                                        getMap<span class="signature">()</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{<a href="module-ol_Map-Map.html">Map</a>
                                            | null}</span>

                                        <span class="inherited"><a
                                                href="module-ol_control_Control-Control.html#getMap">inherited</a></span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/Control.js">control/Control.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/Control.js#L104">line
                                            104</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">
                                <div class="description">
                                    <p>获取与此控件关联的地图。</p>
                                </div>











                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                Map.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id="getOverviewMap">
                                    </div>
                                    <h4 class="name">
                                        getOverviewMap<span class="signature">()</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{<a
                                                href="module-ol_Map-Map.html">Map</a>}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/OverviewMap.js">control/OverviewMap.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/OverviewMap.js#L664">line
                                            664</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">




                                <div class="description">
                                    <p>Return the overview map.</p>
                                </div>











                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                Overview map.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer inherited">
                                    <div class="anchor" id="getProperties">
                                    </div>
                                    <h4 class="name">
                                        getProperties<span class="signature">()</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{Object.&lt;string, *>}</span>

                                        <span class="inherited"><a
                                                href="module-ol_Object-BaseObject.html#getProperties">inherited</a></span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/Object.js">Object.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/Object.js#L157">line
                                            157</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">




                                <div class="description">
                                    <p>获取包含所有属性名称和值的对象。</p>
                                </div>











                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                Object.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer inherited">
                                    <div class="anchor" id="getRevision">
                                    </div>
                                    <h4 class="name">
                                        getRevision<span class="signature">()</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{number}</span>

                                        <span class="inherited"><a
                                                href="module-ol_Observable-Observable.html#getRevision">inherited</a></span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/Observable.js">Observable.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/Observable.js#L79">line
                                            79</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">




                                <div class="description">
                                    <p>获取此对象的版本号。每次对象被修改时，其版本号将递增。</p>
                                </div>











                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                Revision.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id="getRotateWithView">
                                    </div>
                                    <h4 class="name">
                                        getRotateWithView<span class="signature">()</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{boolean}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/OverviewMap.js">control/OverviewMap.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/OverviewMap.js#L633">line
                                            633</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">




                                <div class="description">
                                    <p>Return <code>true</code> if the overview map view can rotate, <code>false</code>
                                        otherwise.</p>
                                </div>











                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                True if the control view can rotate.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer inherited">
                                    <div class="anchor" id="on">
                                    </div>
                                    <h4 class="name">
                                        on<span class="signature">(type, listener)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{<a
                                                href="module-ol_events.html#~EventsKey">EventsKey</a> | Array&lt;<a
                                                href="module-ol_events.html#~EventsKey">EventsKey</a>>}</span>

                                        <span class="inherited"><a
                                                href="module-ol_Observable-Observable.html#on">inherited</a></span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/Observable.js">Observable.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/Observable.js#L152">line
                                            152</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">




                                <div class="description">
                                    <p>监听特定类型的事件。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>type</code></td>



                                            <td class="type">


                                                <span class="param-type">string</span>
                                                |

                                                <span class="param-type">Array.&lt;string></span>




                                            </td>



                                            <td class="description last">
                                                <p>事件类型或事件类型的数组。</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>listener</code></td>



                                            <td class="type">


                                                <span class="param-type">function</span>




                                            </td>



                                            <td class="description last">
                                                <p>侦听器函数。</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                监听器的唯一键。如果将事件类型的数组作为第一个参数调用，返回将是键的数组。
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer inherited">
                                    <div class="anchor" id="once">
                                    </div>
                                    <h4 class="name">
                                        once<span class="signature">(type, listener)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{<a
                                                href="module-ol_events.html#~EventsKey">EventsKey</a> | Array&lt;<a
                                                href="module-ol_events.html#~EventsKey">EventsKey</a>>}</span>

                                        <span class="inherited"><a
                                                href="module-ol_Observable-Observable.html#once">inherited</a></span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/Observable.js">Observable.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/Observable.js#L164">line
                                            164</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">




                                <div class="description">
                                    <p>仅监听特定类型的事件一次。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>type</code></td>



                                            <td class="type">


                                                <span class="param-type">string</span>
                                                |

                                                <span class="param-type">Array.&lt;string></span>




                                            </td>



                                            <td class="description last">
                                                <p>事件类型或事件类型的数组。</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>listener</code></td>



                                            <td class="type">


                                                <span class="param-type">function</span>




                                            </td>



                                            <td class="description last">
                                                <p>侦听器函数。</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                监听器的唯一键。如果将事件类型的数组作为第一个参数调用，返回将是键的数组。
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer inherited">
                                    <div class="anchor" id="render">
                                    </div>
                                    <h4 class="name">
                                        render<span class="signature">(mapEvent)</span>

                                        <span class="inherited"><a
                                                href="module-ol_control_OverviewMap-OverviewMap.html#render">inherited</a></span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/OverviewMap.js">control/OverviewMap.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/OverviewMap.js#L673">line
                                            673</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">




                                <div class="description">
                                    <p>Update the overview map element.</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>mapEvent</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_MapEvent-MapEvent.html">MapEvent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Map event.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>













                            </dd>




                            <dt class="">

                                <div class="nameContainer inherited">
                                    <div class="anchor" id="set">
                                    </div>
                                    <h4 class="name">
                                        set<span class="signature">(key, value, <span
                                                class="optional">silent</span>)</span>

                                        <span class="inherited"><a
                                                href="module-ol_Object-BaseObject.html#set">inherited</a></span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/Object.js">Object.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/Object.js#L215">line
                                            215</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">




                                <div class="description">
                                    <p>设置值。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>key</code></td>



                                            <td class="type">


                                                <span class="param-type">string</span>




                                            </td>



                                            <td class="description last">
                                                <p>键名称。</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>value</code></td>



                                            <td class="type">


                                                <span class="param-type">*</span>




                                            </td>



                                            <td class="description last">

                                                <p>Value.</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>silent</code></td>



                                            <td class="type">


                                                <span class="param-type">boolean</span>

                                                | undefined


                                            </td>



                                            <td class="description last">
                                                <p>是否在不触发事件的情况下进行更新。</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>













                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id="setCollapsed">
                                    </div>
                                    <h4 class="name">
                                        setCollapsed<span class="signature">(collapsed)</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/OverviewMap.js">control/OverviewMap.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/OverviewMap.js#L612">line
                                            612</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">




                                <div class="description">
                                    <p>Collapse or expand the overview map according to the passed parameter. Will
                                        not do anything if the overview map isn't collapsible or if the current
                                        collapsed state is already the one requested.</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>collapsed</code></td>



                                            <td class="type">


                                                <span class="param-type">boolean</span>




                                            </td>



                                            <td class="description last">

                                                <p>True if the widget is collapsed.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>













                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id="setCollapsible">
                                    </div>
                                    <h4 class="name">
                                        setCollapsible<span class="signature">(collapsible)</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/OverviewMap.js">control/OverviewMap.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/OverviewMap.js#L594">line
                                            594</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">




                                <div class="description">
                                    <p>Set whether the overview map should be collapsible.</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>collapsible</code></td>



                                            <td class="type">


                                                <span class="param-type">boolean</span>




                                            </td>



                                            <td class="description last">

                                                <p>True if the widget is collapsible.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>













                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id="setMap">
                                    </div>
                                    <h4 class="name">
                                        setMap<span class="signature">(map)</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/OverviewMap.js">control/OverviewMap.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/OverviewMap.js#L272">line
                                            272</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">
                                <div class="description">
                                    <p>从当前地图中删除控件并将其附加到新地图中。传递 <code>null</code>
                                        以仅从当前地图中删除控件。子类可以在此处设置事件处理程序以获取有关地图更改的通知。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>map</code></td>



                                            <td class="type">


                                                <span class="param-type"><a href="module-ol_Map-Map.html">Map</a></span>
                                                |

                                                <span class="param-type">null</span>




                                            </td>



                                            <td class="description last">

                                                <p>Map.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>













                            </dd>




                            <dt class="">

                                <div class="nameContainer inherited">
                                    <div class="anchor" id="setProperties">
                                    </div>
                                    <h4 class="name">
                                        setProperties<span class="signature">(values, <span
                                                class="optional">silent</span>)</span>

                                        <span class="inherited"><a
                                                href="module-ol_Object-BaseObject.html#setProperties">inherited</a></span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/Object.js">Object.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/Object.js#L235">line
                                            235</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">




                                <div class="description">
                                    <p>设置一个键值对的集合。请注意，这将更改任何现有属性并添加新属性（不会删除任何现有属性）。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>values</code></td>



                                            <td class="type">


                                                <span class="param-type">Object.&lt;string, *></span>




                                            </td>



                                            <td class="description last">

                                                <p>Values.</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>silent</code></td>



                                            <td class="type">


                                                <span class="param-type">boolean</span>

                                                | undefined


                                            </td>



                                            <td class="description last">
                                                <p>是否在不触发事件的情况下进行更新。</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>













                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id="setRotateWithView">
                                    </div>
                                    <h4 class="name">
                                        setRotateWithView<span class="signature">(rotateWithView)</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/OverviewMap.js">control/OverviewMap.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/OverviewMap.js#L642">line
                                            642</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">




                                <div class="description">
                                    <p>Set whether the overview map view should rotate with the main map view.</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>rotateWithView</code></td>



                                            <td class="type">


                                                <span class="param-type">boolean</span>




                                            </td>



                                            <td class="description last">

                                                <p>True if the control view should rotate.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>













                            </dd>




                            <dt class="">

                                <div class="nameContainer inherited">
                                    <div class="anchor" id="setTarget">
                                    </div>
                                    <h4 class="name">
                                        setTarget<span class="signature">(target)</span>

                                        <span class="inherited"><a
                                                href="module-ol_control_Control-Control.html#setTarget">inherited</a></span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/Control.js">control/Control.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/control/Control.js#L155">line
                                            155</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">
                                <div class="description">
                                    <p>此函数用于为控件设置目标元素。如果控件已添加到地图中 (即控件的
                                        <code>setMap</code>方法被调用后)，则调用此函数不会有任何效果。如果在控件构造函数传递的选项中未设置目标，并且未调用<code>setTarget</code>，则控件将添加到地图的覆盖容器中。
                                    </p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>target</code></td>



                                            <td class="type">


                                                <span class="param-type">HTMLElement</span>
                                                |

                                                <span class="param-type">string</span>




                                            </td>



                                            <td class="description last">

                                                <p>Target.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>













                            </dd>




                            <dt class="">

                                <div class="nameContainer inherited">
                                    <div class="anchor" id="un">
                                    </div>
                                    <h4 class="name">
                                        un<span class="signature">(type, listener)</span>

                                        <span class="inherited"><a
                                                href="module-ol_Observable-Observable.html#un">inherited</a></span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/Observable.js">Observable.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/Observable.js#L173">line
                                            173</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">




                                <div class="description">
                                    <p>取消监听特定类型的事件。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>type</code></td>



                                            <td class="type">


                                                <span class="param-type">string</span>
                                                |

                                                <span class="param-type">Array.&lt;string></span>




                                            </td>



                                            <td class="description last">
                                                <p>事件类型或事件类型的数组。</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>listener</code></td>



                                            <td class="type">


                                                <span class="param-type">function</span>




                                            </td>



                                            <td class="description last">
                                                <p>侦听器函数。</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>













                            </dd>




                            <dt class="">

                                <div class="nameContainer inherited">
                                    <div class="anchor" id="unset">
                                    </div>
                                    <h4 class="name">
                                        unset<span class="signature">(key, <span class="optional">silent</span>)</span>

                                        <span class="inherited"><a
                                                href="module-ol_Object-BaseObject.html#unset">inherited</a></span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/Object.js">Object.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/Object.js#L259">line
                                            259</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">




                                <div class="description">
                                    <p>取消设置属性。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>key</code></td>



                                            <td class="type">


                                                <span class="param-type">string</span>




                                            </td>



                                            <td class="description last">
                                                <p>键名称。</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>silent</code></td>



                                            <td class="type">


                                                <span class="param-type">boolean</span>

                                                | undefined


                                            </td>



                                            <td class="description last">
                                                <p>在不触发事件的情况下取消设置属性。</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>













                            </dd>

                        </dl>





                    </article>

                </section>




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